Pipe-coupling for air-brakes



(MOdeL) T. H. HABBRKORN.

PIPE COUPLING FOR AIR BRAKES.

Patented Mar. 5, 1889.

Hf. g..

INVENTOR WITNESSES TaTns PATENT OTTTCE.

PIPE-COUPLING FOR AIR-BRAKES.

SPECIFICATION forming part of Letters Patent No. 398,829, dated March 5, 1889.

Application iiled June 21, 1888.

To (all whom. i/ hb (j/ (wire/"712' Be it known that I, Tnnononn H. HABER- KORN, of Fort ayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Pipe-Couplings for Air-Brakes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in pipe-coupling for air-brakes; and it consists in certain features of construction and in combination of parts, hereinafter described. and pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation. Fig. iis a side elevation in section through the center of the coupling. Figs. 3 and 4 are respectively top and bottom plans. Fig. 5 a side elevation of the one member of the coupling detached. Figs. (3 and 7 are end elevations of the respective members of the coupling, a portion of the packing-ring being broken away in the latter. Fig. 8 is a side elevation in section through the center of the packing-ring detached.

The two members of the coupling are intended to be alike, but when coupled are in reverse'positions, with heads A A facing and engaging each other. The tubular portions 13 are deflected upward at b, as shown, and have reduced end sections, 1), adapted to connect, respectively, with flexible tubes, (not shown,) such as are commonly used for such purpose. Each head A on the face thereof is provided with an annular groove, (1, for securing a packing-ring. Each head has a circumferential segmental external flange divided into three sections, respectively, A, A and A the intervening spaces between the differentsections being adapted to receive loosely the corresponding sections of the opposing member of the coupling. Each flanged section A at the one end thereof terminates in a lug of considerable length projecting circumferentially, these lugs having faces a for mutual engagement, such faces being on an incline of perhaps twenty-five degrees (more or less) to a transverse plane of the coupling, these lugs being located at the under side of the coupling. (See Fig. i.) Flanged sections l A have short lugs located on the upper side I i i l i i i i Serial No. 277,736. (Modeld of the coupling, the engaging faces ther of, a having only a slight inclination. (See Fig.

The packing-rings are of rubber, with a tubular section, 0, adapted to be pressed into groove a, and asection, 0-, reduced in diameter and in thickness of material, as shown more clearly in Fig. 8.

In coupling the device the operator grasps section b in either hand,and preferably at or near the connection with the flexible tubes, and first presses the two members of the coupling together on the lower side, lugs A meantime serving as guides and interlocking lugs a and overlapping these lugs, the one on the other their full length, and while lugs a. are retained in such position the upper sides of the two members of the coupling are brought together, the engaging lugs a meantime serving as fulcrums, and the two lugs a pass by each other with the closing of the couplin after which the two sections of the coupling are turned on their axes in opposite directions to cause lugs a to engage or overlap each other, such reverse movements of the two members of the coupling causing lugs to to move eircumferentially in opposite directions; but as these lugs are comparatively long they still overlap each other something more than half their lengths when lugs a are interlocked, the position of lugs a and a when the coupling is locked or coupled being shown, respectively, in Figs. at and 3.

In closing the coupling the packing is compressed, so as to form a tight joint, and the thin edges 0 of the packing projecting somewhat into the chamber of the coupling, the air-pressure is applied to both sides of such united thin edges and presses the latter more firmly together, thus preventing a possibility of leakage between the two packing-rings.

The outward pressure on the two members of the coupling caused by the recoil of the packing and by the air-pressure in the pipes would tend to turn the two members of a coupling in the opposite directions, that would more firmly look lugs owing to the more inclined faces of lugs a, and the coupling therefore remains firmly looked as against any internal. pressure. So long as the cars remain coupled there is slack enough in the flexible pipes to prevent any draft on the coupling.

\Vhen the cars are uncoupled and move apart, the draft on the coupling, owing to the v upward trend of section B, comes entirely on the upper side of the coupling, such draft be- 5 ing sustained entirely by lugs a the first result of which is to compress the lower sides of the coupling, so that there will be little or no pressure on lugs a. In fact, these lugs would likely be separated a trifle, after which 10 lugs a although their faces have but slight i 5 ure at the time on lugs at their inclined faces offer m) resistance to such slight rotative movementin opposite directions of the two 1nembers of the coupling. The coupling therefore needsno attenticnin uncoupling the cars,

20 but will automatically draw apart as thecars separate.

After the cars are coupled the coupling of the-air-pipes in the manner beforeexplainefl equire hu a momen s tim \Vhat I claim is- 1. In pipe-coupling for air-brakes, the combination, with interlocking lugs connected with the respective members of the coupling and located in pairs, respectively, on the lower and upper sides of the coupling, the lower lugs having longer and more inclined engaging faces than the upper lugs, of tubular sections of the coupling, such tubular sections trending upward from the axis of the coupling, substantially as set forth.

2. In a pipe-coupling, the combination of the two members, each provided with a guiding-lug,A and with lugs A ,havin g extended overlapping projections a a, and with lugs A having short overlapping faces a (1 suban ia y a s -forth- In'testimony whereof I sign this specification,i n the presence of two witnesses, this 26th day ofMarch, 1 888.

HEOD .H- HABERKQR Witnesses: R- S ROBERTEQM :N- A :B B ZBI Q 

